Finding the Fourth Proportional to 676,111, 932,997.70 and 370,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   676,111 : 932,997.70 = 370,128.72 : x
2. Step 2: Convert to fraction form
   676,111/932,997.70 = 370,128.72/x
3. Step 3: Cross multiply
   676,111x = 932,997.70 × 370,128.72
4. Step 4: Simplify right side
   676,111x = 345,329,244,463.94
5. Step 5: Solve for x
   x = 345,329,244,463.94/676,111
6. Step 6: Final answer
   x = 510,758.21